Physicochemical Properties of Peptide



PPepDB ID:PPepDB_708
Number of amino acids:94
Molecular Weight:9976.51 Da
Theoretical pI:5.05


Amino Acid Composition:


Amino acidAmino acid countAmino acid percentage
Alanine ALA (A)99.57%
Cysteine CYS (C)66.38%
Glutamic Acid GLU (E)99.57%
Aspartic Acid ASP (D)22.13%
Glycine GLY (G)99.57%
Phynylalanine PHE (F)22.13%
Isoleucine ILE (I)77.45%
Histidine HIS (H)00%
Lysine LYS (K)77.45%
Methionine MET (M)11.06%
Leucine LEU (L)99.57%
Asparagine ASN (N)44.26%
Glutamine GLN (Q)11.06%
Proline PRO (P)33.19%
Serine SER (S)88.51%
Arginine ARG (R)22.13%
Threonine THR (T)55.32%
Tryptophan TRP (W)11.06%
Valine VAL (V)66.38%
Tyrosine TYR (Y)33.19%


Atomic Composition:


ElementElement's AbbreviationCount
CarbonC437
HydrogenH707
NitrogenN113
OxygenO138
SulphurS7

FormulaC437H707N113O138S7
Total Number of Atoms:1402


Total number of positively charged residues (ARG + LYS):9
Total number of negatively charged residues (ASP + GLU):11
Extinction Coefficient:Extinction coefficients are in units of M-1 cm-1, at 280 nm measured in water.

Ext. coefficient    10345
Absorption 0.1% (=1 g/l)    1.037,   assuming all pairs of CYS residues form cystines

Ext. coefficient    9970
Absorption 0.1% (=1 g/l)    0.999,   assuming all CYS residues are reduced
Aromaticity:0.064

Aromaticity is the calculated relative frequency of Phe+Trp+Tyr
Instability Index:The computed Instability Index (II) is : 50.67

This indicates that the protein/peptide is unstable
Secondary Structure Fraction [Helix, Turn, Sheet]:[29.79, 25.53, 29.79]

Amino acids in helix: V, I, Y, F, W, L || Amino acids in turn: N, P, G, S || Amino acids in sheet: E, M, A, L
Aliphatic index:94.4681
Grand average of hydropathicity (GRAVY):0.15